Lock PDF Files with Local Encryption
Need to secure a document but don't want to trust third-party servers? Our Protect PDF tool runs entirely in your browser, keeping your passwords and files private.
When to use this solution:
Use this when handling sensitive financial records, legal contracts, or identity documents that require an extra layer of security before sharing.
Common Use Cases
1Step-by-Step Guide
Upload your PDF
Drag and drop your file or select it from your device. No file is ever uploaded to our servers.
Set passwords
Choose a User Password (to open) and/or an Owner Password (for structural security).
Local Processing
The encryption happens instantly using your browser's power, keeping your sensitive data safe.
Download Secure PDF
Save the newly encrypted document directly to your computer.
Ready to get started?
Use our free tool to solve this problem in seconds. No installation required.
Protect PDF NowFrequently Asked Questions
What kind of encryption do you use?
We use industry-standard RC4 128-bit encryption, which is compatible with Adobe Acrobat and all modern web browsers.
Do you see my password?
Absolutely not. The encryption logic runs locally on your machine. We never receive or store your passwords or files.